🔧 Solder Like a Pro: Elevate Your Craft with Kester! Perfectly crafted at 0.8mm for optimal performance. 60% Tin, 40% Lead for superior conductivity. Engineered for consistent results in every application. Meets J-STD-004 standards for professional use. Experience seamless soldering with rapid flux action. 2.5x2.5x2.25 in 0.8mm Diameter Made in USA The Kester Solder 44 Rosin Core #66/44 is a high-quality soldering wire designed for professionals. With a diameter of 0.8mm and a unique rosin core composition, it ensures instant wetting and reliable performance. Manufactured in the USA, this solder meets industry standards, making it an essential tool for any serious technician or hobbyist.